Wedge-operated locking arrangement for sliding members



E. c; mam.- WEDGE OPERATED LOCKING ARRANGEMENT FOR SLIDING MEMBERS.

APPLICATION men OCT. 12, m1.

Patehtd Nov. 2, 1920.

2 SHEETS-SHEET I- E. C. MARTET.

WEDGE OPERATED LOCKING ARRANGEMENT FOR SLIDING MEMBERS. APPLICATION man OCT. 12, 19:1.

1,357,576. I Patented Nov. 2, 1920.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFlCE.

EUGENE CLAUDE MARTET, OFQPARIS, FRANCE, ASSIGNOR TO LA PRECISION MECANIQUE, 0F PARIS, FRANCE.

WEDGE-OPERATED LOCKING ARRANGEMENT FOR SLIDING MEMBERS;

Application filed. October 12, 1917.

To all whom it may concern: 4

Be it known that I EUGENE CLAUDE MAR- rnr, a citizen of the Fepublic of France, residing at Paris, France, have invented new and useful Improvements in lVedge-Operated Locking Arrangements for Sliding Members, of which the following is a speciiication.

This invention has forits object a wedge operated locking arrangement by which automatic and instantaneous immobility of a sliding member can be produced by simple release of a lever serving to operate it.

In the accompanying drawings there is shown by way of example a locking arrangement according to the invention applied to a slide gage.

Referring to the drawings, Figure 1 is a front view of the slide gage the retaining plate of the locking arrangement being omitted in order to permit the whole arrangement to be seen.

Fig. 2 is a section on the line AA of Fig. 1, the retaining plate being assumed to be in position.-

Fig. 3 is a view similar to Fig. 1 of a modified form of the invention; and Fig. 4 is a section on the line M-N of Fig. 3.

In the example given the slide is formed by the Vernier in which the rod slides with slight friction. w

The locking arrangement comprises, as shown two wedges a and Z) respectively under the control of springs c and (Z which normally press these two wedges against one another and engage them in the space between the rod and the slide thus producing locking action.

When in order to move the sliding member the lever 72 inclosed in the body of the sliding member is pressed the locking arrangement is automatically released. The pivoting movement of the lever causes displacement of the wedge a which is pushed upward compressing its spring 0 and so long as this lever is pressed the two wedges are maintained apart thus allowing the sliding member to move freely along the rod. When the pressure exerted is relieved the lever is returned to position under the action of its spring 7* and permits the wedge 66 to re-assume its locking position. The slide is thus instantaneously immobilized on the rod.

It is to be noted that the length of the Specification of Letters Patent.

Patented Nov. 2, 1920. Serial No. 196,298.

wedges is such as to permit of the taking up of play due to wear.

The arrangement of the lever may be reversed according to the purposes for which the slide is intended and the wedges may be more or less large according to the space at disposal for applications of any kind where this locking slide may be employed.

Referring to the modified form of invention shown in Figs. 8 and 4:, it will be observed that a spring blade 9 is placed between the wedge a of the sliding member 7", and the rod it, this spring being attached to the frame 2' of the device by two pins 6.

This spring separates the wedge from the rod, and its use between these two parts avoids all action of the wedge upon the rod when the wedge is operated by the lever 22.

Moreover the locking arrangement is entirely contained within the frame 2' which is completely closed on the side next the rod h by said spring blade g.

When the sliding member is removed from the rod by sliding it off the end of said rod, the spring blade 9 prevents any abnormal movement of the working parts, and the sliding member can be replaced upon the rod in exactly the same way as for an ordinary sliding member without looking arrangement.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A locking means for a sliding member comprising in combination a rod, a sliding member adapted to be shifted along said rod, a piece adapted to bear against a wall of the sliding member said piece having an inclined plane, a cooperating wedge inserted between said inclined plane and the rod, means for forcing the wedge into contact with said inclined plane and positive means for separating the wedge from the piece.

2. A locking means for a sliding member comprising in combination a rod, a sliding member, adapted to be shifted along said rod, a piece adapted to bear against a wall of the sliding member said piece having an inclined plane, a cooperating wedge inserted between said inclined plane and the rod, a spring adapted to force the wedge into contact with said inclined plane, and a lever adapted to separate the wedge from the piece.

8. A locking means for a sliding member, and a lever adapted to separate the Wedge comprising in combination: a rod, a sliding from the piece. 7 V member adapted to be shifted along said n testimony whereof I have signed my rod, a piece adapted to bear against a wall name to this specification in the presence of 5 of the sliding member, said piece having an WO Subscribing Witnesses.

inclined plane a spring blade extending be- 7 a V a [n tween said piece and the rod, a Wedge in- EUGENE CLAUDE MAHTET' serted between said inclined plane and the Witnesses: spring blade, a spring adapted to force the LOUIS MOSES, 10 Wedge into contact with said inclined plane, CHAS; P, PRESSLY, 

